That's right, the gorgeous Neil Lane engagement ring that Viall used to propose to Vanessa Grimaldi on Monday's season finale of The Bachelor is actually the same one Hayes had picked out for JoJo Fletcher on The Bachelorette.

It's easy to see why the 3.75-carat sparkler -- featuring a round-cut center diamond stone surrounded by a halo of smaller diamonds and two larger baguette-cut diamonds -- caught the eye of both men. The real question is how?

"I bring six rings and over the years, over the nine years, some are the same, some have changed settings or are re-designed, and some are totally new," he reveals.

As for Hayes' reaction to the recycled ring, he says he's happy it found a home on someone's finger.

"It was interesting to find out. It didn't really matter to me -- JoJo never saw my ring! But Vanessa looks happy. I'm happy for her and I'm happy for the ring," he said. "It was kind of funny for it to happen for the first time in Bachelor history with Nick of all people."